A logical volume provides storage virtualization so you are not restricted to physical disks sizes. The hardware storage configuration is hidden and the logical volume can be resized and moved on the fly.
An LVM Logical Volume has three components:
- Physical Volumes (PV)
- Volume Groups (VG)
- Logical Volumes (LV)
First of all, you have to initialize a new PV using the pvcreate command:
pvcreate /dev/sdc*
You can create a PV from a whole disk rather than partitions.